Research on green manufacturing technology of furan based self flame retardant epoxy resin
The intrinsic flame retardant furfuryl amine epoxy resin was synthesized using furfurylamine,epichlorohydrin and tetrabutyl amine bromide as raw materials.The effects of raw material ratio and process on the product were investigated by tests of epoxy value and hydrolyzable chlorine content.The results showed that when the molar ratio of furfurylamine to epichlorohydrin(ECH)was 1∶5 and the molar ratio of NaOH to ECH was 1∶1,the epoxy equivalent,hydrolyzable chlorine and volatile of furfurylamine epoxy resin was 122 g/eq,0.14 wt％,and 0.190 wt％,respectively.The composition and structure of the product were clear by liquid chromatography/mass spectrometry analysis.After curing the product with 4,4'-diaminodiphenyl sulfone,the polymer was analyzed by infrared spectroscopy,thermogravimetric analysis and combustion test.The results showed that the initial decomposition temperature of the product was 293 ℃,which had good thermal stability,good heat resistance and flame retardancy.The preparation of the epoxy resin does not require solvent,and the process is green and environmentally friendly.The raw material can be converted or separated from biomass such as corncob,which has good application value.
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